摘要:
A refrigerating machine oil composition comprising at least one ester additive selected from tetraesters of pentaerythritol and one selected from fatty acids having 5 to 18 carbon atoms and hexaesters of dipentaerythritol and one selected from fatty acids having 5 to 18 carbon atoms, and a base oil that is an ester other than the ester additive, in which the content of the ester additive is 2 to 20 mass% based on the total amount of the refrigerating machine oil composition, and the kinematic viscosity of the refrigerating machine oil composition at 40°C is 3 to 500 mm 2 /s.
摘要:
Mixtures of select neopentyl polyol esters are found to be highly miscible with the refrigerant R-32 over a wide temperature range. Working fluids are provided comprising R-32 and a lubricant containing these select neopentyl polyol esters and having a kinematic viscosity at 40° C. of 32 cSt or higher. Specifically, the lubricant composition of the invention comprises a mixture of alkylcarboxy esters of neopentyl polyols, wherein at least 10 wt % of all neopentyl polyol esters are esters of pentaerythritol oligomers of 4 or more pentaerythritol monomer groups, and wherein a majority of the alkylcarboxylate groups of the alkylcarboxy esters of neopentyl polyols are pentanoyl groups wherein at least 15% of the pentanoyl groups are branched.
摘要:
The invention relates to a composition comprising 2,3,3,3-tetrafluoropropene and a lubricating oil comprising a polyalkylene glycol and a polyol ester, the polyol ester content in the lubricating oil being less than or equal to 25%. The invention further relates to the use of said composition in methods for heating or cooling.
摘要:
Provided are refrigerant compositions which are blends of one or more hydrofluorocarbons, siloxanes, hydrocarbons and lubricants, as well as methods for using these compositions in applications such as the recharging of refrigeration systems and for replacing a chlorofluorocarbon or hydrochlorofluorocarbon in a refrigeration system.
摘要:
The present invention provides a method for evaluating a refrigerant composition comprising hydrofluoropropene, a stabilizer, and optionally a lubricant, comprising (a) heat-treating the refrigerant composition in the presence or absence of oxygen in an airtight container, and then (b1) determining the acid content of the refrigerant composition, and/or (b2) if the refrigerant composition comprises a lubricant, the total acid value of the lubricant contained in the heat-treated refrigerant composition.
摘要:
Various uses of fluoroalkenes, including tetrafluoropropenes, particularly (HFO-1234) in a variety of applications, including as blowing agents are disclosed.
摘要:
The refrigerating machine oil of the invention includes an ester of a polyhydric alcohol and a fatty acid, wherein the molar ratio of C 4 -C 6 fatty acid and C 7 -C 9 branched fatty acid in the fatty acid is between 15:85 and 90:10, the C 4 -C 6 fatty acid includes 2-methylpropanoic acid, and the ratio of the total C 4 -C 6 fatty acid and C 7 -C 9 branched fatty acid in the total fatty acids composing the ester is at least 20 mol%. The working fluid composition for a refrigerating machine according to the invention comprises the refrigerating machine oil, a difluoromethane refrigerant and/or an unsaturated fluorinated hydrocarbon refrigerant.
摘要:
Various uses of fluoroalkenes, including tetrafluoropropenes, particularly (HFO-1234) in a variety of applications, including as blowing agents are disclosed.
摘要:
An azeotrope-like mixture consisting essentially of a binary azeotrope-like mixture consisting essentially of trans-1-chloro-3,3,3-trifluoropropene (trans-HFO-1233zd) and a second component selected from the group consisting of 2,3,3,3-tetrafluoropropene (HFO-1234yf) and trans-1,3,3,3-tetrafluoropropene (trans-HFO-1234ze), and combinations of these and various uses thereof.